Toothbrush



FIG. 1 is a front perspective view of the article;

FIG. 2 is a side view of the article;

FIG. 3 is a rear view of the article;

FIG. 4 is a view from avove the article; and,

FIG. 5 is a view from below the article. 

The ornamental design for a toothbrush, as shown and described. 